Table 3.
Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and positive likelihood ration (LR+) of HRAM for diagnosis dyssynergic subtypes and FDD.
| Line-plot patterns | Sensitivity | Specificity | PPV | NPV | LR+ |
|---|---|---|---|---|---|
| Abnormal | 94.1 | 12.9 | 51.9 | 68.8 | 1.1 |
| Type I dyssynergia | 20.0 | 63.5 | 35.4 | 44.3 | 0.6 |
| Type II dyssynergia | 4.7 | 91.8 | 36.4 | 49.1 | 0.6 |
| Type III dyssynergia | 16.5 | 84.7 | 51.9 | 50.3 | 1.1 |
| Type IV dyssynergia | 45.9 | 80.0 | 69.6 | 59.6 | 2.3 |
| Types I–IV (FAR) | 87.1 | 20.0 | 52.1 | 60.1 | 1.1 |
| Types II + IV (FDD) | 50.6 | 71.8 | 64.2 | 59.2 | 1.8 |
FAR: failed anal relaxation; FDD: functional defecation disorder.
All values, except LR+, expressed as percentages.